Question

What is the sum of the geometric sequence 1,3,9... If there are 14 terms?

Answer 1

Explanation:

`s_n=(a(r^n-1))/(r-1),\ a=initial,\ r=common\ ratio,\ n=term\ number\\ \\ s_(14)=(1(3^14-1))/(2)\\ \\ s_(14)=2391484`